Scraper



May 20, 1941.

w. c. GoDwx-N SCRAPER Filed Nov. 20, 1939 2 Sheets-Sheet l @Y QW NN io@ o m..

www4. f @N #a Illllllvll n Qs NNWN

INVENTQFD ATTORNEYS May 20, 1941. w. c. GoDw'lN SCRAPER Filed NOV. 20, 1939 2 Sheets-Sheet 2 ATTORNEYS Patentecl May 2.9, 1941 Fries 3 Claims.

IvIy invention relates to improvements in Wheeledscrapers of the type employing a loadcarrying bucket which is pivotally supported so that it may turn completely over during the dumping operation.

One of the principal objects of my invention is to provide a scraper of the above described character equipped with novel means for effecting actuation of the bucket to dumping position.

Another object of my invention is to provide a scraper of the above described character which is simple in construction, durable in use, efiicient in operation and economical in manufacture.

Other objects and advantages will be apparent from the following description, appended claims and annexed drawings.

Referring to the drawings wherein like reference characters designate like parts throughout the several views: Y

Figure 1 is a top plan view of my invention.

Figure 2 is a sectional view taken substantially on the line 2-2 of Figure l.

Figure 3 is a detail side elevation illustrating the means for conditioning the bucket for operation to dumping position.

Figure 4 is a transverse sectional view of the bucket.

Figure 5 is a sectional View taken on the line 5 5 of Figure 1 and illustrating in detail one of the latch assemblies.

Figure 6 is a fragmentary end elevation of the iront of the device, partly in section.

Figure 7 is a detail side elevation looking from the opposite side of the device with respect to Figure 3 and illustrating the means of assisting in conditioning the bucket for rotation to unloading position.

Figure 8 is a horizontal detail sectional view illustrating the means of connecting the knife to the tongue.

Figure 9 is a detail perspective View of the bracket for connecting the central portion of the knife to the tongue.

In practicing my invention as illustrated in the drawings, I employ a frame having an upper p substantially V-shaped horizontally disposed section 5 comprising a pair of rearwardly diverging frame members 6, the latter being formed at their forward ends with depending sections 1.

The depending sections l, at their lower ends, y

clevis I3 or the like to which is detachably connected one end of a tractor draw bar I4 by which the device or scraper is operated as hereinafter set forth.

The rear ends of the frame members 6 are pivotally connected as at I5 to the upper ends of upwardly extending spaced frame members or arms I6, the lower ends of the latter being pivotally connected, by pivots I'I, to the rear ends of a pair of spaced and substantially horizontally disposed scraper bars I8. The front ends of the bars E8 are pivotally connectedpy pivots I9, to the lower ends of a pair of inclined arms 20, the upper ends of the latter being integral with the rear ends of the portions II of the frame members Ill.

The front end sections of the bars I8 are fashioned with downwardly and forwardly inclined portions 22, the latter terminating in horizontally disposed front end portions.23. The end portions 23 have fixed to their outer side faces, by means of rivets 23a, the sides of brackets 23h,

the latter being also pivoted to the arms 20 by the pivots Iii. The brackets 23h are formed with bottoms or horizontally disposed portions 23o riveted to the ends of a transversely extending soil digging or scraping knife or element v24, for receiving a desired layer of soil for loading into a scraper bucket 25 arranged at the rear of said knife Vand hereinafter described. Be,- tween the ends thereof, the knife 24 has secured thereto the horizontally disposed portion v2da of a bracket 24h, the latter having a side portion 24C pivoted to the rear end of the tongue I2 by means p of a pivot2lld. Obviously, the knife, due'to being pivotally connected to the armsA 28 and tongue I2 by the pivots I9 and 24d respectively, may be adjusted with respect to the arms 20 upon movement or adjustment of the bars I8 with respect to the arms I8. In order to elect adjustment of the arms I6 with respect to thebars I8, the lower ends of the arms I6 are formed with a plurality of openings lla for selectively receiving therethrough the pivots I'l whereby adjustment of the bars I8 may be had and thus effect adjustment of the knife 24 at a desired angle with respect to the bucket 25. The rear end sections o the bars I8, adjacent their front end sections, have mounted on their upper faces fixed bearings 2E rotatably receiving transversely disposed stub shafts or trunnions 21, the inner ends of the latter being centrally fixed tothe outer side faces of the scraper bucket 25 whereby to dispose said bucket between the bars I8 and permit rotation of the bucket in a manner hereinafter set forth.

The rear faces of the frame members I6, adjacent their lower ends, are provided with bearings 28 in which is rotatably mounteda transverse shaft 29, the ends of the latter having sejcured thereto traction wheels 30 for maintaining and moving the device over the ground.

As viewed in the drawings, the scraper bucket 25 comprises a pair of spaced end disks 3| to which the trunnions 21 are fixed. The disks are formed with inwardly circumferentially disposed flanges 32 and the lower sides of said disks are formed with a fiat or plane face 33, the latter being disposed in substantial horizontality when the bucket is being operated in load-receiving condition whereby said face has sliding engagement with the ground. Interposed between said disks, is a body member 34 of a substantially L-shaped configuration having upright and horizontal sections 35 and v36 respectively. Each of the sections 35 and 36 is provided with right angularly disposed end flanges riveted to the inner faces of the disks 3| thereby forming the scraper bucket 25. The horizontal section 36, of the member 34, is normally disposed in a plane extending in parallelism with the plane of the knife or element 24.

Rigidly connected to the lower end sections of the members I6, are the lower ends of upwardly and forwardly inclined brackets'31, the upper ends of the latter being angled and slidably receiving therethrough bolts 38 having forwardly disposed headed ends extending through angle portions 39 provided on the end sections of a transverse bar 40. 'The end sections of the bar 48 are provided with depending arms 4| having lower ends fixed to the sides of the bars I 8. The rear ends of the bolts 38 are provided with nuts 42. Sleeved onv said bolts between the nuts 42 and the upper ends of the brackets 31 are coiled cushioning springs 43 whereby to cushion relative movement between the brackets 31 and bar 40. The nuts 42 serve to adjust the tension of the springs 43.

Oppositely disposed from the section 35 of the member 34 and connected to the upper sections of the disks are the ends of a transversely extending latch bar or member 44, the latter havlng mounted thereon a ternary of rollers 45 having engagement with a plurality of latch bolts 46 forming parts of latch assemblies 41 respectively. 'I'he latch pawls 46, when engaged with the rollers 45, serve to preclude forward rotation of the bucket 25 during loading operation of the latter and as hereinafter more fully described. In the present embodiment, the latch assemblies 41 are three in number and are arranged with one assembly adjacent each disk 3| and with the other assembly intermediate the disks, the latter assembly being indicated generally by the reference character 48. Inasmuch as all of the latch assemblies are of a like construction, a detailed vdescription of one will suffice, it being understood that the reference numerals indicative of the parts of one assembly are indicative of like parts of the other assemblies. Each of the latch `assemblies comprises an arm 49 pivoted to a hanger 56 secured on the bar 48. The front end of the bar 49 has pivoted thereto the latch pawl or dog 46, the lower end of which engages the front vface of the roller 45 to preclude rotation of the bucket from dumping direction. The upper end of the dog 46 has pivoted thereto the front end of a link 52, the rear end of the latter being pivoted to the forward end of an arm 53 fixed to a transverse shaft 54 journaled in the arm 49 of each of the assemblies 41. In the instance of the assembly 48, the arm 53 is fashioned with an angularly disposed portion and constitutes a bell crank lever 55 pivotally connected to the rear end of a forwardly extending rod 56.

The axis of the shaft 54 and those of the pivots connecting the link 52 to the arm 53 and dog 46 are normally maintained in the same transverse plane as indicated in full lines in Figure 5. However, upon actuation of the bell crank lever 55 by the rod 56, the rear end of the link 52 will be disposed downwardly out of said plane and thereby pivot the dog 46 out of engagement with the roller 45 as indicated in dotted lines in Figure 5 of the drawings. 'I'his latter described position of the dog permits forward rotation of the bucket to effect dumping of the contents thereof as hereinafter set forth.

Secured to the bar 49 and rearwardly thereof lare a pair of spaced bearings 51 in which is journaled a rock shaft 58, the outer end of the latter having fixed thereto a rock arm 59 to which is pivoted the upper end of a lift rod 60. The lower end of said lift rod extends through a pitman bar 6| between the ends thereof and said lower end of the rod 68 is provided with a collar 62 for engagement with the under face of the bar 6| whereby to lift the same upon upward movement of the rod 66.

The inner end of the rock shaft 58 has fixed thereon an arm 63 pivotally connected to the rear end of a link 64. The front end of the link 64 is pivotally connected to the upper end of an arm 65, the lower end of the latter being fixed to the shaft 54. Obviously, movement of the shaft 54 to effect release of the dog 46 with respect to the bar 44 also serves to effect upward movement of the pitman bar 6| The front end of the pitman bar 6| is pivotally connected to a crank arm 66 fixed to one of the trunnions 21.

The hub 61 of one of the wheels 39 is provided with a ternary of inwardly extending pins 68 for selective engagement with an upwardly disposed hook section 69 formed on the rear end of the pitman bar 6|. Obviously, raising of the pitman bar 6| disposes the end 69 within the rotating path of one of the pins 66 and effects engagement thereof and causes movement of the pitman bar in a rearward direction whereupon the trunnion connected to the crank arm 66 is rotated thereby effecting like rotation of the bucket 25. Adjacent the hooked end 69, the pitman bar 6| is provided with a raised section or projection 10 which is engaged by one of the pins 68 during rotation of the hub 61 to disconnect or release the end 69 from its connected pin 68.

The lower end of one of the members |6 extends an appreciable distance subjacent the adjacent bar |8 and has secured thereto one end of a coil spring 1|, the opposite end of the latter being pivotally secured to a crank arm 13 fixed to the oppositely disposed trunnion 21 with respect to the trunnion having the crank arm 66 secured thereto. This construction serves to assist in initiating the rotation of the bucket 25 toward dumping position and to overcome any tendency of the bucket to be rotated in the opposite direction by maintaining the roller 45 in engagement with the dog 46 when the latter is disposed in front of said roller.

One of the depending sections 1 has pivoted thereto the lower end of a lever 14, the upper end section of which is pivoted to the front end of the rod 56 for operating the latch assemblies 41. Subjacent the lever 14, the section 1 has rotatably mounted thereon a pulley 15 over which is trained a cable 16. The rear end portion of the cable 16 is provided with a pair of connected sections 11 trained over pulleys 18 connected to a cross bar 19 iixed to the frame members 6. The rear ends of the cable sections 11 depend from the pulleys 18 and are connected to the rear ends of the portions Il of the frame members I for raising and lowering the frame section 9 with respect to the frame members B. The front end of the cable 16 is connected to a source of lifting power (not shown) for instance a tractor. lI'he rear end of the tongue I2 has connected thereto the inner ends of a pair of laterally extending braces 19, the outer ends of the latter being connected to the rear portions Il of the frame members I0 by means of rivets 80.

In operation (the parts being in the position illustrated in Figure 2 and pull being applied to the draw bar I4) the knife 24 functions to undercut soil and load the same within the bucket 25. Upon the bucket 25 having obtained a desired load, the cable 16 is operated to raise the rear end of the frame members IIJ thereby lifting both the knife 24 and the bucket 25 upwardly and above the level of the ground. When the parts are thus positioned, the device may be moved to a desired area for dumping the bucket 25. To accomplish dumping of the bucket 25, the upper end of the lift 14 is moved forwardly thereby releasing the dogs 46 from engagement with the rollers 45 and simultaneously raising the pitman bar 6I through the medium of the rod 6B. 'Ihe raising of the pitman bar disposes the hook end 69 into the path of one of the pins 68 whereupon said end is engaged and Causes rotation of the bucket 25 to dumping position, as heretofore described. Release of the end 69 of the pitman bar 6l from its pin 68 permits continued rotation of the bucket 25 until the rollers 45 engage the dogs 46 which have been actuated to engaging position during the rotation of the bucket through the medium of a spring 8l connected between one -of the frame members and the lever 14 as clearly illustrated in Figure 2 of the drawings. In this position, the bucket 25 is set for another loading operation.

It is obvious that the invention is not confined to the herein described use therefor as it may be utilized for any purpose to which it is adaptable. It is therefore to be understood that the invention is not limited to the specific construction as illustrated and described, as the saine is only illustrative of the principles of operation, which are capable of extended application in advance forms, and that the invention comprehends all construction within the scope of the appended claims. What is claimed is:

1. In a wheeled scraper, a frame having a plurality of pivoted and relatively movable sections for movement with respect to each other, a bucket rotatably mounted on one of said sections and having a crank arm fixed thereto i'or rotating said bucket, an axle mounted on said frame and rearwardly of said bucket, wheels carried by said axle for supporting one end of said frame above the ground and with one of said wheels provided with inwardly and axially extending pins, means connected to the other end of said frame for supporting said last mentioned end above the ground, a latch mechanism supported on said last mentioned section for normally maintaining said w bucket in loading position and operable for permitting rotation of said bucket to unloading position, means slidably connected to another of said sections and fixed to still another section for raising said rst-mentioned section to effect elevating of said bucket out of load-receiving position, means for operating said mechanism to condition said bucket for rotation to unloading position, a rod connected to said crank arm and formed with a hooked end for disposal within the path of one of said pins, and means connecting said rod to said latch mechanism and operable by the latter for disposing said hooked end into engagement with one of said pins whereby to rotate said bucket to unloading position upon rotation of said wheels.

2. In a wheeled scraper, a frame having a plurality of pivoted and relatively movable sections for movement with respect to each other, a bucket rotatably mounted on one of said sections and having a crank arm fixed thereto for rotating said bucket, an axle mounted on said frame and rearwardly of said bucket, wheels carried by said axle for sup-porting one end of said frame above the ground and with one of said wheels provided with inwardly and axially extending pins, means connected to the other end of said frame for supporting said last mentioned end above the ground, a latch mechanism supported on said last-mentioned section for normally maintaining said bucket in loading position and operable for permitting rotation of said bucket to unloading position, means slidably connected to another of said sections and xed to still another section for raising said rst-mentioned section to effect elevating of said bucket out of load-receiving position, means for operating said mechanism to condition said bucket for rotation to unloading position, and means connected to said `crank arm and operable by said latch mechanism for engagement with one of said pins for effecting rotation of said bucket to said last-mentioned position.

3. In a wheeled scraper, a frame having a plurality of pivoted andV relatively movable sections for movement with respect to each other, a bucket rotatably mounted on one of said sections and having a crank arm fixed thereto for rotating said bucket, an axle mounted on said frame and rearwardly of said bucket, wheels carried by said axle for supporting one end of said frame above the .ground and With one of said wheels provided with inwardly and axially extending pins, means connected to the other end of said frame for supporting said last mentioned end above the ground, a latch mechanism supported on said last-mentioned section for normally maintaining said bucket in loading position and operable for permitting rotation of said bucket to unloading position, means slidably connected to another of said sections and fixed to still another section for raising 4said rstmentioned section to effect elevating of said bucket out of load-receiving position, means f-or operating said mechanism to condition said bucket for rotation to unloading position, a rod connected to said crank arm and formed with a hooked end for disposal within the path of one of said pins, and means connecting said rod to said latch mechanism and operable by the latter for disposing said hooked end into` engagement with one of said pins whereby to rotate said bucket to unloading position upon rotation of said wheels, said rod provided with a projection engageable by another of said pins for disposing said hooked end out of engagement with said first mentioned pin to permit rotation of said bucket to load-receiving position.

WILLIAM C. GODWIN. 

